SPECIES ACCOUM’S 
Wedge-tailed Shearwater ( Puffirius pacificus) 
Only two of this species (both dark phase) were observed south of 
the equator. The greatest concentrations were noted in large feeding 
flocks at 5°N (31 January) and 11°N (7 February), all but a very 
small percentage of which were light phase birds. 
Townsend Shearwater ( Puffinus auricularis ) 
This species was observed only in the vicinity of the Mexican and 
Central American coasts. Over 80 percent of the total number recorded 
were observed in the large flocks of 7 February at 13°N. Black under¬ 
tail coverts, as well as the black back, were distinct on several closely 
observed indicivuals. 
Audubon 1 s Shearwater ( Puffinus lherminieri ) 
This species was observed only in the vicinity of the Galapagos Is¬ 
lands. The brown back was distinct on several closely observed individ¬ 
uals . 
Dark-rumped Petrel ( Pterodroma phaeopygia ) 
Two individuals of this species were observed on 2 February at 7°W 88°W. 
Juan Fernandez Petrel ( Pterodroma externa ) 
This species was observed only south of the equator. Individuals were 
observed daily from 20°S to the equator along 98°W. 
Black-winged Petrel ( Pterodroma hypoleuca ) 
This species was observed only south of the equator. 
White-winged Petrel ( Pterodroma leucoptera ) 
White-winged Petrels were observed only south of the equator. Half of 
these were recorded on a single day (20 February). This species was distinguished 
by the dark crown and side of head. 
